trichlorfon

n.
A colorless crystalline compound, C₄H₈Cl₃O₄P, used as an agricultural insecticide.

[TRI- + CHLOR(O)- + -fon (alteration of (phos)phon(ate), a chemical compound : PHOSPH(ORUS) + -ON(E) + -ATE²).]

An organophosphorus insecticide and anthelmintic, used in horses, often in combination with other anthelmintics, for treatment of endoparasites and cutaneous habronemiasis. Also used in dogs against whipworms and as a pour-on in cattle for control of warble flies. It is used in fishponds and commercial fish farms to control anchorworms, gill flukes and lice. Called also metrifonate.